Q3711. Identify the incorrect statement concerning greenhouse gases.
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Q3712. Which of the following was NOT an explicit objective of the New Economic Policy of 1991?
Explanation
The New Economic Policy of 1991 was designed to stabilize the economy and implement structural reforms to improve efficiency. Its explicit objectives included reducing the fiscal deficit, increasing foreign exchange reserves, and improving public sector efficiency. The policy aimed to open the Indian economy to global markets through liberalisation. Therefore, plunging the economy into a closed autarky was the exact opposite.
Q3713. The melting of permafrost in the Arctic is a major concern because it threatens to release massive amounts of which potent greenhouse gas?
Explanation
In the cold regions of the north, the ground remains frozen throughout the year, trapping large amounts of ancient organic matter. As temperatures rise and this frozen layer thaws, microbes begin to break down the material. This biological process releases a powerful greenhouse gas into the atmosphere. This release is a major concern because it can trigger further warming and even more rapid melting.
Q3714. Consider the following events regarding India’s progression in Ease of Doing Business and arrange them in correct chronological order:
I. India ranks in the top 100 for the first time.
II. Introduction of the Business Reform Action Plan (BRAP) for states.
III. World Bank discontinues the Doing Business report.
Select the correct order:
I. India ranks in the top 100 for the first time.
II. Introduction of the Business Reform Action Plan (BRAP) for states.
III. World Bank discontinues the Doing Business report.
Select the correct order:
Explanation
The progression of India’s engagement with the Ease of Doing Business framework began with domestic initiatives like the Business Reform Action Plan. Following systematic reforms, India significantly improved its international standing, ranking in the top 100 of the World Bank index for the first time in 2017. Finally, the World Bank discontinued the Doing Business report globally in 2021 following data irregularities.
Q3715. How do higher global temperatures directly affect sea levels?
Explanation
Rising global temperatures cause sea levels to increase through two primary physical processes. First, the heat causes glaciers and polar ice sheets to melt, adding more liquid water to the oceans. Second, as the ocean water itself warms up, it physically expands and takes up more space. Together, these factors lead to a steady rise in the average height of the world’s seas.
Q3716. The concept of "plug and play" infrastructure, frequently mentioned in recent industrial policies and industrial corridors, refers to:
Explanation
In recent industrial policy discussions, plug and play infrastructure refers to the provision of ready-to-use industrial facilities. These are pre-built factory sheds equipped with all necessary utilities like electricity, water, and high-speed internet connectivity. This model allows entrepreneurs to start their manufacturing operations immediately without spending time on land acquisition. It is a key strategy used in industrial corridors.
Q3717. Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R):
Assertion (A): Carbon dioxide is the most significant anthropogenic greenhouse gas despite having a lower global warming potential than methane.
Reason (R): Carbon dioxide is present in the atmosphere in much larger concentrations and persists for a longer duration than methane.
Assertion (A): Carbon dioxide is the most significant anthropogenic greenhouse gas despite having a lower global warming potential than methane.
Reason (R): Carbon dioxide is present in the atmosphere in much larger concentrations and persists for a longer duration than methane.
Explanation
While some gases are more potent at trapping heat than others, their total impact depends on their concentration and how long they remain in the air. Carbon dioxide is released in massive quantities from burning fossil fuels and stays in the atmosphere for centuries. Therefore, even though a molecule of methane is more effective at absorbing radiation, the sheer volume of carbon dioxide makes it the primary driver.
Q3718. Match List I with List II and select the correct answer.
| Industrial Term/Policy | Associated Sector/Scope |
|---|---|
| A. White Goods | i. Logistics and Multimodal Connectivity |
| B. PM Gati Shakti | ii. PLI scheme target sector (ACs and LEDs) |
| C. Make in India | iii. Innovation and early-stage enterprise support |
| D. Startup India | iv. 27 broadly identified sectors for manufacturing push |
Explanation
Various government schemes target specific industrial goals. The Production Linked Incentive scheme for White Goods focuses on air conditioners and LED lights. PM Gati Shakti is a master plan dedicated to improving logistics and multimodal connectivity. The Make in India initiative identifies twenty-seven broad sectors for a manufacturing push. Meanwhile, the Startup India program is designed to support innovation.
Q3719. The ozone layer is predominantly found in which layer of the Earth’s atmosphere?
Explanation
The Earth’s atmosphere is divided into several distinct layers based on temperature and composition. A specific region containing a high concentration of a three-atom oxygen molecule is located above the lowest layer where weather occurs. This protective shield sits between approximately fifteen and thirty-five kilometers above the surface. Its presence is vital for life because it filters out most of the sun’s harmful ultraviolet radiation.
Q3720. What is the primary function of the stratospheric ozone layer?
Explanation
High in the atmosphere, a thin layer of gas performs a critical role in protecting all living things on Earth. It acts as a natural filter, absorbing the majority of the high-energy ultraviolet radiation from the sun. Without this shield, this radiation would reach the surface in amounts that could cause widespread damage to DNA, increase skin cancer rates, and harm many different types of ecosystems.Answer key for these questions
| Q | Correct answer |
|---|---|
| 3711 | (b) Methane is exclusively produced by industrial activities. |
| 3712 | (b) To plunge the Indian economy into a closed autarky |
| 3713 | (b) Methane |
| 3714 | (b) II, I, III |
| 3715 | (a) Via thermal expansion and ice melting |
| 3716 | (c) Pre-built factory sheds with utilities ready for manufacturing. |
| 3717 | (a) Both A and R are true and R is the correct explanation of A. |
| 3718 | (a) A-ii, B-i, C-iv, D-iii |
| 3719 | (c) Stratosphere |
| 3720 | (b) It absorbs harmful solar UV radiation |
Frequently asked questions
How many RAS Prelims practice MCQs are there on RAS Prelims?
This page has 9654 practice MCQs on the RAS Prelims syllabus. Each has the correct answer, and most have an explanation.
How should I practise MCQs for RAS Prelims?
Attempt each question first, then open the answer and read the explanation. Practise one chapter at a time, note the facts you got wrong and revise them. Repeat the chapter after a few days.
Are these actual RAS Prelims past-paper questions?
No. These are practice questions written for the RAS Prelims syllabus. They follow the pattern the exam uses: factual questions, statement-based questions, match-the-list and assertion-reason.